Asthma

Asthma

In the United States, more than 22 million people suffer from asthma. Asthma affects people of all ages, but it usually starts during childhood. Nearly six million asthma sufferers are children. There is no one cause of asthma. Instead, the various types are diagnosed based on what triggers an attack. These are the most common types of asthma, along with triggers and characteristics of each: